A.R.M.S.#40L-P

A.R.M.S.® #40L-P
Designed for U.S. Special Operations Forces and under contract with Crane Naval Surface Warfare Center.
The P stands for precision.

.50 moa = minute of angle, means at 100 meters, each click of the windage knob moves the apertures .50 = 1/2 inch, which means point of impact .50 left or right of the previous click setting. Pat. Nos 5533292, 7356962, D526380